Species Details

Juncus leiospermus var. leiospermus

Red Bluff dwarf rush

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Photo of Juncus leiospermus var. leiospermus

Classification

Scientific Name: Juncus leiospermus F.J. Herm. var. leiospermus
Common Name: Red Bluff dwarf rush
Family:	Juncaceae
Element Code:	PMJUN011L2
USDA Plants Symbol:	JULEL
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G2T2
State Rank:	S2
Other Status:	BLM_S; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-03-01

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-Jun

Elevation:
35 - 1250 meters
115 - 4100 feet

General Habitats:

Chaparral
Cismontane woodland
Meadows and seeps
Valley and foothill grassland
Vernal pools

Microhabitat Details:

Microhabitat:

Vernally Mesic

Notes

Notes:
Threats: Threatened by development, grazing, vehicles, industrial forestry, and agriculture.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	12
	Total EOs	% of EOs
EOs with Threat Listed:	38	61 %
Development	22	35%
ORV activity	10	16%
Grazing	10	16%
Agriculture	5	8%
Logging	3	4%
Dam/Inundation	2	3%
Other	2	3%
Road/trail construction/maint.	2	3%
Vandalism/dumping/litter	1	1%
Altered flood/tidal/hydrologic regime	1	1%
Foot traffic/trampling	1	1%
Mining	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					62
A	B	C	D	X	U
7	18	8	3	4	22

Occurrence Status:
Historical >20 Years	42
Recent <=20 Years	20

Presence:
Presumed Extant	58
Possibly Extirpated	3
Presumed Extirpated	1

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Butte (BUT), Placer (PLA), Shasta (SHA), Tehama (TEH)

Quads: Name (Quad Code)
Balls Ferry (4012242), Bend (4012232), Black Butte Dam (3912273), Blossom (4012224), Burney (4012186), Burney Falls (4112116), Burney Mtn. West (4012176), Campbell Mound (3912187), Cherokee (3912165), Cottonwood (4012243), Enterprise (4012253), Henleyville (3912283), Olinda (4012244), Oroville (3912155), Palo Cedro (4012252), Project City (4012263), Red Bluff East (4012222), Red Bluff West (4012223), Richardson Springs (3912177), Roseville (3812173), Shippee (3912156), Tuscan Buttes Ne (4012241), West of Gerber (4012213)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

Click on quad for name. Hold Shift Key to use mouse scroll wheel

Selected References

Original Description:	Leaflets of Western Botany 5:113 (1948)
Taxonomic Treatment:	Memoirs of the New York Botanical Garden 39:46-51 (1986)
Species Account:	Juncus leiospermus var. leiospermus profile for potential Species of Conservation Concern evaluation (2018)
Other:	USFS Potential Species of Conservation Concern Profile